I'm working my way down the surveyor's list on my new H37.5. One of the survey items the insurance company has zeroed in on is that the cannister enclosing the propane tank does not have a gas impermeable gasket sealing the lid on the cannister. Does anyone have any thoughts on appropriate material and source for such a gasket? Thanks for your help.Gary WyngardenS/V Wanderlust H37.5